STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2025		Dec. 31, 2024		Dec. 31, 2023
Statement of Comprehensive Income [Abstract]
Net (loss) income	[2]	$ 112.5	[1]	$ 65.7	[3]	$ 67.8	[3]
Other comprehensive income (loss), net of tax-Note 11:
Defined benefit plans		3.4		8.1	[4]	8.2	[4]
Cash flow hedges		2.9		(0.7)	[4]	1.7	[4]
Other comprehensive (loss) income, net of tax		6.3	[1]	7.4	[4]	9.9	[4]
Comprehensive income		$ 118.8		$ 73.1	[4]	$ 77.7	[4]

[1] Adjusted to reflect the retrospective change in inventory valuation methodology from LIFO to WAC. See Note 18 for further discussion.

[2] See Note 16 for supplemental disclosure of cash flow information.

[3] Adjusted to reflect the retrospective change in inventory valuation methodology from LIFO to WAC. See Note 18 for further discussion.

[4] Adjusted to reflect the retrospective change in inventory valuation methodology from LIFO to WAC. See Note 18 for further discussion.